GB1512849A - Hybrid circuits for communication systems - Google Patents

Hybrid circuits for communication systems

Info

Publication number
GB1512849A
GB1512849A GB33483/75A GB3348375A GB1512849A GB 1512849 A GB1512849 A GB 1512849A GB 33483/75 A GB33483/75 A GB 33483/75A GB 3348375 A GB3348375 A GB 3348375A GB 1512849 A GB1512849 A GB 1512849A
Authority
GB
United Kingdom
Prior art keywords
path
coupled
amplifying means
capacitor
bidirectional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB33483/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1512849A publication Critical patent/GB1512849A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)

Abstract

1512849 Hybrid circuits WESTERN ELECTRIC CO Inc 12 Aug 1975 [16 Aug 1974] 33483/75 Heading H4R A hybrid circuit for coupling an incoming path 35 and an outgoing path 34 to a bidirectional path TLI comprises amplifying means AH having a feedback arrangement for cancelling from signals outgoing from the bidirectional paths, signals received from the incoming path. The amplifying means is coupled to the bidirectional path via a transformer 11, the primary 10 of which is coupled in series with a capacitor across the path TLI, and the secondary 12 of which is coupled in series with a further capacitor 14 which provides a frequency compensating feedback signal to the amplifying means. The arrangement is to reduce hybrid instability at low frequencies caused by the large inductance of the coupling transformer. The capacitor 14 and resistor 15 operate in conjunction with components 31-33 to reduce the gain of the transmit amplifier at low frequencies, the components 31-33 correcting a D.C. imbalance caused by resistor 15. The application is to resonant transfer PAM, TDM telephone systems.
GB33483/75A 1974-08-16 1975-08-12 Hybrid circuits for communication systems Expired GB1512849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/498,056 US3934099A (en) 1974-08-16 1974-08-16 Bias, feedback and network arrangements for hybrid circuits

Publications (1)

Publication Number Publication Date
GB1512849A true GB1512849A (en) 1978-06-01

Family

ID=23979430

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33483/75A Expired GB1512849A (en) 1974-08-16 1975-08-12 Hybrid circuits for communication systems

Country Status (8)

Country Link
US (1) US3934099A (en)
JP (1) JPS5832811B2 (en)
CA (1) CA1047659A (en)
DE (1) DE2535900C2 (en)
FR (1) FR2282197A1 (en)
GB (1) GB1512849A (en)
IT (1) IT1041826B (en)
SE (1) SE402038B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2607480C2 (en) * 1976-02-20 1982-11-25 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Circuit arrangement for a fork
US4074087A (en) * 1976-08-16 1978-02-14 Bell Telephone Laboratories, Incorporated Bidirectional voice frequency repeater
WO1981003728A1 (en) * 1980-06-18 1981-12-24 Advanced Micro Devices Inc Subscriber line audio processing circuit apparatus
US4488294A (en) * 1982-03-30 1984-12-11 At&T Bell Laboratories Establishing and supporting data traffic in private branch exchanges
CA1239718A (en) * 1985-10-11 1988-07-26 Trillium Telephone Systems Inc. Key telephone system
CA1240088A (en) * 1985-11-20 1988-08-02 Mitel Corporation Solid state trunk circuit
US4758822A (en) * 1986-04-30 1988-07-19 Gte Communication Systems Corporation Bidirectional amplifier
US4716358A (en) * 1986-11-12 1987-12-29 Northern Telecom Limited Constant current circuits
US4982426A (en) * 1989-01-19 1991-01-01 Northern Telecom Limited Telecommunications line interface circuits
US5282157A (en) * 1990-09-13 1994-01-25 Telecom Analysis Systems, Inc. Input impedance derived from a transfer network
US5515433A (en) * 1994-08-30 1996-05-07 Reltec Corporation Resistance forward telephone line feed circuit
US6298046B1 (en) * 1998-08-28 2001-10-02 Rc Networks Adjustable balancing circuit for an adaptive hybrid and method of adjusting the same
US6751202B1 (en) * 1999-04-30 2004-06-15 3Com Corporation Filtered transmit cancellation in a full-duplex modem data access arrangement (DAA)
US7050574B1 (en) 1999-09-30 2006-05-23 Stmicroelectronics, Inc. Telephone line interface circuit and method
US6603352B2 (en) 2001-12-03 2003-08-05 Icefyre Semiconductor Corporation Switched-mode power amplifier integrally performing power combining
US7342300B2 (en) * 2003-06-30 2008-03-11 Zarbana Digital Fund Llc Integrated circuit incorporating wire bond inductance
US8213489B2 (en) 2005-06-23 2012-07-03 Agere Systems Inc. Serial protocol for agile sample rate switching
US7773733B2 (en) * 2005-06-23 2010-08-10 Agere Systems Inc. Single-transformer digital isolation barrier
US7940921B2 (en) * 2005-06-23 2011-05-10 Agere Systems Inc. Continuous power transfer scheme for two-wire serial link
FR2906098B1 (en) * 2006-09-14 2009-04-03 Rene Duranton METHOD AND DEVICE FOR TRANSMITTING INFORMATION ON A COMPLEX NETWORK.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480742A (en) * 1967-03-31 1969-11-25 Bell Telephone Labor Inc Hybrid circuit
US3586881A (en) * 1967-12-29 1971-06-22 Bell Telephone Labor Inc Transistor hybrid circuit
US3789154A (en) * 1972-12-11 1974-01-29 Bell Telephone Labor Inc Switchhook status signaling arrangement
US3828146A (en) * 1973-03-22 1974-08-06 Bell Telephone Labor Inc Time division conference hybrid circuit
US3855431A (en) * 1973-04-02 1974-12-17 Itt Electronic hybrid amplifier

Also Published As

Publication number Publication date
DE2535900C2 (en) 1985-08-22
FR2282197A1 (en) 1976-03-12
SE402038B (en) 1978-06-12
JPS5832811B2 (en) 1983-07-15
CA1047659A (en) 1979-01-30
IT1041826B (en) 1980-01-10
FR2282197B1 (en) 1979-06-15
JPS5144851A (en) 1976-04-16
SE7508836L (en) 1976-02-17
US3934099A (en) 1976-01-20
DE2535900A1 (en) 1976-02-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee